KGB Disappearing Ink Pen

Sorry for all the thinkgeek stuff, it's just...well.....I check them everyday ok?!
Anyway, the KGB Disappearing Ink Pen is not your ordinary dime-store gag. Developed by KGB scientists, anything you write with this pen will completely 'self-destruct' (ok, disappear) within 48 hours. There'll be no trace of your message, even using UV lights or other detection methods.
I'm trying to think what to use this for. Prank messages for which I can't be blamed? Lending a pen for vigorous note taking only to see their work vanish? $14.99.
Use responsibly...
But of course I'd love to hear your ideas in the comments.

Treat yourself or someone you know to royalty.
This giant inflatable King's Chair inflates to a whopping 65 inches tall and 40 inches wide.
It comes with two cup holders so you'll always have your favorite beverage by your ...Treat yourself or someone you know to royalty.
This giant inflatable King's Chair inflates to a whopping 65 inches tall and 40 inches wide.
It comes with two cup holders so you'll always have your favorite beverage by your side.
It can be used as a throne for a competition winner, a regal chair for Santa Claus, as a prop, or just for someone's office, apartment or college dorm room.
It's a great addition to a guy's man-cave.
Does not come with a pump.
$119.99

High-tech meets low tech and the coolest accessory for your phone was born. iPlunge is the perfect solution for your video emergencies — just squish it against the back of your iPod®, iPhone®, or any device with a smooth hard sur...High-tech meets low tech and the coolest accessory for your phone was born. iPlunge is the perfect solution for your video emergencies — just squish it against the back of your iPod®, iPhone®, or any device with a smooth hard surface, sit back, and smile.

These faux-fancy dinner napkins are genius. Experience all the joys of getting gussied-up without even trying.
A pack of 20 quality 3-ply paper napkins printed with a range of four elegant neck-ties. Each napkin measures approx...These faux-fancy dinner napkins are genius. Experience all the joys of getting gussied-up without even trying.
A pack of 20 quality 3-ply paper napkins printed with a range of four elegant neck-ties. Each napkin measures approximately 12.75" square.
$6

Norman looks like your ordinary run of the mill garden gnome, from one of a number you'd expect to find in your typical enchanted forest. However, when somebody walks past this particular gnome, he's there with a fart, insult or o...Norman looks like your ordinary run of the mill garden gnome, from one of a number you'd expect to find in your typical enchanted forest. However, when somebody walks past this particular gnome, he's there with a fart, insult or off-color greeting. This little guy is quite a hoot! Fitted with motion detectors, he makes the perfect door greeter, automatically letting his hilarious insults fly when someone approaches.

You're gonna need a bigger pool for this giant fella.
This giant inflatable shark will provide you with endless ideas for pranking your family and friends! Think of the loud shriek your mom will let out when she pulls back the ...You're gonna need a bigger pool for this giant fella.
This giant inflatable shark will provide you with endless ideas for pranking your family and friends! Think of the loud shriek your mom will let out when she pulls back the shower curtain to find this shark sheepishly resting in the tub!

The most diabolical Gadget EVER!
The Annoy-a-tron generates a short (but very annoying, hence the name) beep every few minutes. Your unsuspecting target will have a hard time 'timing' the location of the sound because the beeps...The most diabolical Gadget EVER!
The Annoy-a-tron generates a short (but very annoying, hence the name) beep every few minutes. Your unsuspecting target will have a hard time 'timing' the location of the sound because the beeps will vary in intervals ranging from 2 to 8 minutes. The sound is generically annoying enough, but if you really really want to aggravate somebody, select the 15 kHz sound. Trust me. The higher frequency and slight 'electronic noise' built into that soundbyte will make your douche bag co-workers go insane.. muah hahahahaahhahah
It comes with the following sounds:
15kHz (Teen Buzz tone** - young folks can hear it, older folks cannot!) (full volume)
Cricket chirping (medium/low volume)
IM Doorbell (low volume)
Grating Electronic noise (full volume)
Typical Electronic Beep (medium volume)
By far the best line of defense in strategic office warfare… UP YOUR GAME SON!